WLAN Transmitter Frequency Subblocks for Wideband Decoding Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting broadband transmission in wireless local area networks (WLANs) without increasing the complexity and burden of existing structures, particularly when increasing the size of the frequency band.
Innovation Solution
A method and transmitter that determine the number of bits assigned to a single axis of a signal constellation and use multiple encoders to generate coded blocks, which are then parsed into frequency subblocks for transmission, allowing for efficient support of wider bandwidths without requiring a larger interleaver size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of the interleaver is increased to support a larger frequency band, then frequency diversity gain and coding gain are improved, but device complexity and structural burden increase
Solution Approach 1:
The coded block is divided into multiple frequency subblocks, each of which is independently interleaved. This segmentation allows the system to achieve frequency diversity gain across the entire bandwidth without requiring a single large interleaver, thereby reducing device complexity while maintaining reliability.
2Productivity
If the size of the frequency band is increased to support broadband transmission, then data throughput is improved, but the burden on existing structure and complexity increases
Solution Approach 1:
The frequency band is divided into multiple subblocks that can be processed independently through encoding and interleaving. This allows broadband transmission to be achieved without requiring the entire bandwidth to be processed as a single large block, thereby reducing structural complexity while maintaining high data throughput.
Solution Approach 2:
The patent introduces a new dimension of processing by parsing coded blocks into frequency subblocks along the frequency dimension. This allows the system to handle wide bandwidths by distributing data across multiple frequency subblocks rather than increasing the size of existing structures in the time or spatial dimensions.
3Ease of manufacture
If contiguous bits are assigned to the same reliability level on signal constellation, then encoding simplicity is maintained, but decoding performance deteriorates
Solution Approach 1:
The patent applies different reliability assignments to different portions (local regions) of the coded block. By parsing the coded block into frequency subblocks and assigning bits to different reliability levels in a non-uniform manner across these subblocks, the system improves decoding performance while maintaining reasonable encoding complexity through localized differentiation rather than global complexity.
Data Source
AI summary
Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.